The Private In-Browser TinyPNG Alternative: No 5MB Limits
Compress JPEG, PNG, and WebP images with full quality control. No 5MB file size limits, no 20-image batch limits, and zero cloud uploads.
TinyPNG is one of the most famous image compressors, but it enforces a strict 5MB maximum file size limit, caps batches at 20 images, uploads your private photographs to remote cloud servers, and provides zero control over compression strength. PDFDock is the ideal alternative: compress images of any size directly in your browser with full slider control over compression quality.
Feature Comparison: PDFDock vs TinyPNG
Detailed head-to-head comparison across security, performance, limits, and pricing.
| Feature | PDFDock (Recommended) | TinyPNG |
|---|---|---|
| File Size Limit | No limit (handles 50MB+ photos) | Strict 5MB limit per file |
| Quality Control | Granular 10%–100% slider | Automated black-box (no control) |
| File Upload Required | No — local browser Canvas API | Yes — uploaded to remote servers |
| Supported Formats | PNG, JPEG, WebP | PNG, JPEG, WebP |
| Batch Limit | Unlimited batch capacity | Max 20 images per batch |
| Resize & Crop Included | Yes — dedicated resize & crop tools | No — compression only |
| Pricing | 100% Free Forever | Subscription required for >5MB |
Why People Are Switching from TinyPNG to PDFDock
Key architectural differences that give you more freedom, speed, and privacy.
1No 5MB File Size Limitation
TinyPNG rejects files larger than 5MB on its free tier. PDFDock compresses massive 20MB–50MB camera RAW and high-res photos effortlessly.
2Granular Quality Slider Control
TinyPNG applies a fixed automated quantization that you cannot adjust. PDFDock gives you a 10% to 100% quality slider to achieve your exact desired file size.
3Complete Photographic Privacy
TinyPNG uploads your photos to their servers. PDFDock uses HTML5 Canvas and browser WebWorkers; photos never leave your device.
4Comprehensive Image Toolset
Beyond compression, PDFDock lets you resize dimensions, transcode formats (PNG, JPG, WebP), crop images with pixel precision, and convert photos to PDF.
1-to-1 Replacement Guide: Which Tool Replaces What?
Instantly replace your existing workflow with PDFDock's free, client-side tools.
Customizable quality slider without 5MB file restrictions
Change width/height with aspect ratio lock
Transcode between PNG, JPEG, and WebP instantly
Convert batches of optimized images into a single PDF
Frequently Asked Questions: TinyPNG vs PDFDock
Q.Can PDFDock compress images larger than 5MB?▼
Yes! Because PDFDock processes images locally inside your web browser's memory using the HTML5 Canvas API, there are no artificial file size caps. You can easily compress 10MB, 20MB, or 50MB photos.
Q.Does PDFDock compress PNG with transparency?▼
Yes. PDFDock preserves alpha transparency channels when compressing PNG images.
Ready to experience free, private PDF editing without TinyPNG?
No signups, no credit cards, and zero file uploads. Start processing your documents with complete privacy today.